US 11,999,807 B2
Particle size control of supported chromium catalysts in loop slurry polymerization reactors
Max P. McDaniel, Bartlesville, OK (US); Carlton E. Ash, Owasso, OK (US); Kathy S. Clear, Bartlesville, OK (US); Eric D. Schwerdtfeger, Bartlesville, OK (US); Carlos A. Cruz, Kingwood, TX (US); and Jeremy M. Praetorius, Bartlesville, OK (US)
Assigned to Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed by Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed on Sep. 8, 2023, as Appl. No. 18/463,380.
Application 18/463,380 is a continuation of application No. 18/046,212, filed on Oct. 13, 2022, granted, now 11,814,449, issued on Nov. 14, 2023.
Application 18/046,212 is a continuation of application No. 17/716,027, filed on Apr. 8, 2022, granted, now 11,512,154, issued on Nov. 29, 2022.
Application 17/716,027 is a continuation of application No. 17/543,829, filed on Dec. 7, 2021, granted, now 11,325,997, issued on May 10, 2022.
Claims priority of provisional application 63/122,523, filed on Dec. 8, 2020.
Prior Publication US 2023/0416419 A1, Dec. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 10/02 (2006.01); B01J 8/08 (2006.01); B01J 19/24 (2006.01); C08K 3/08 (2006.01); C08K 3/36 (2006.01)
CPC C08F 10/02 (2013.01) [B01J 8/08 (2013.01); B01J 19/2455 (2013.01); C08K 3/08 (2013.01); C08K 3/36 (2013.01)] 32 Claims
OG exemplary drawing
 
1. A supported chromium catalyst comprising a solid oxide and from 0.1 to 15 wt. % chromium, wherein the supported chromium catalyst is characterized by:
(A1) an amount of the supported chromium catalyst with a particle size greater than 100 μm of less than or equal to 3 wt. %;
(A2) a particle size span ((d90-d10)/d50) in a range from 0.5 to 1.4; and
(A3) a d50 average particle size from 15 to 60 μm;
wherein the catalyst contains, independently, less than 0.1 ppm of Mg, V, Ti, Zr, and Hf.